

Struggling with focus on moving objects
Hi!
A few weeks ago I was at a rally; one of my hobbies is taking photos at these events. However, I’ve had a lot of trouble focusing properly on the cars instead of the objects around them. If you look at the image, you can see how the rocks are in sharper focus than the car itself.
Since the cars are moving at high speeds and I don’t have a reference point to adjust the focus, I can’t seem to get the photos to come out right.
For this photo, I used the camera’s default lens: 16-50mm, 1/2000 sec, f/6.3, ISO 250, 350mm, AF-C, and I selected the area where the car should be.
Any advice? Should I have used a bigger aperture?
Thanks!!